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Nonresponders For all current vaccines, there is a significant population of individuals who are considered nonresponders (i.e., nonseroconverters), particularly those with an inability to mount effective B-cell responses

Loren Pickart, who discovered the existence of copper tripeptide in 1973, and Anna Margolina, the copper peptide GHK-Cu: Stimulates blood vessel and nerve outgrowth Increases collagen, elastin and glycosaminoglycan synthesis Supports the function of dermal fibroblasts Improves tissue repair for skin, lung connective tissue, boney tissue, liver and stomach lining

GHK-Cu is a tripeptide composed of three amino acids (glycine, histidine, and lysine) bound to a copper ion

Journal of the National Cancer Institute